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run code in 150+ php & hhvm versions
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<?php $xml=simplexml_load_string(<<<XML <feed> <entry> <id>1980475</id> <link rel="post" href="http://..."></link> <link rel="edit" href="http://..."></link> <link rel="alternate" href="http://..."></link> </entry> <entry> <id>1980476</id> <link rel="post" href="http://..."></link> <link rel="edit" href="http://..."></link> <link rel="alternate" href="http://..."> <lo> naiya </lo> <lo> naiya </lo> </link> </entry> </feed> XML ); echo count($xml->xpath('//link[@rel="alternate"]')); $node = $xml->xpath('//link[@rel="alternate"]'); foreach ($node->children() as $f){ echo $f; }
based on DAX2v
Output for 7.0.0 - 7.1.0
2 Fatal error: Uncaught Error: Call to a member function children() on array in /in/R9NqP:25 Stack trace: #0 {main} thrown in /in/R9NqP on line 25
Process exited with code 255.
Output for hhvm-3.12.0
2 Fatal error: Uncaught exception 'BadMethodCallException' with message 'Call to a member function children() on a non-object (array)' in /in/R9NqP:25 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.6.7 - 5.6.28
2 Fatal error: Call to a member function children() on array in /in/R9NqP on line 25
Process exited with code 255.
Output for 5.0.0 - 5.1.1, 5.1.3 - 5.5.35
2 Fatal error: Call to a member function children() on a non-object in /in/R9NqP on line 25
Process exited with code 255.
Output for 5.1.2
2 Fatal error: Call to a member function children() on a non-object in /in/R9NqP on line 26
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: simplexml_load_string() in /in/R9NqP on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: simplexml_load_string() in /in/R9NqP on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: simplexml_load_string() in /in/R9NqP on line 2